Pith Number

pith:S5ZL5JFO

pith:2017:S5ZL5JFOLLWQTTMO2HHEIV4ACJ

not attested not anchored not stored refs pending

The Calder\'on problem and normal forms

Mikko Salo

arxiv:1702.02136 v1 · 2017-02-07 · math.AP · math.DG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{S5ZL5JFOLLWQTTMO2HHEIV4ACJ}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T00:51:10.190823Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9772bea4ae5aed09cd8ed1ce445780125fbe4f91ac5ec659a5413dfdc17b616c

Aliases

arxiv: 1702.02136 · arxiv_version: 1702.02136v1 · doi: 10.48550/arxiv.1702.02136 · pith_short_12: S5ZL5JFOLLWQ · pith_short_16: S5ZL5JFOLLWQTTMO · pith_short_8: S5ZL5JFO

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/S5ZL5JFOLLWQTTMO2HHEIV4ACJ \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 9772bea4ae5aed09cd8ed1ce445780125fbe4f91ac5ec659a5413dfdc17b616c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a90ae8718da93d412d4034d7b2dc0cd0266916ae25193abf9048facc6a8cf5a",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AP",
    "submitted_at": "2017-02-07T18:50:11Z",
    "title_canon_sha256": "ab03dad29168ac7574654180218f9b14ef09733197d45f97712096a25ef17367"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1702.02136",
    "kind": "arxiv",
    "version": 1
  }
}